package com.hcb.micro.sdk.weixin.util;

import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;

import org.apache.http.HttpResponse;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.params.ClientPNames;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.util.EntityUtils;
import org.apache.log4j.Logger;
import org.jdom.Document;
import org.jdom.Element;
import org.jdom.input.SAXBuilder;

import com.hcb.micro.sdk.weixin.client.HttpClientConnectionManager;

public class GetWxOrderno
{
    public static DefaultHttpClient httpclient;
    
    public static Logger logger = Logger.getLogger(GetWxOrderno.class);
    static
    {
        httpclient = new DefaultHttpClient();
        httpclient = (DefaultHttpClient)HttpClientConnectionManager.getSSLInstance(httpclient);
    }
    
    public static String getPayNo(String url, String xmlParam)
    {
        DefaultHttpClient client = new DefaultHttpClient();
        client.getParams().setParameter(ClientPNames.ALLOW_CIRCULAR_REDIRECTS, true);
        HttpPost httpost = HttpClientConnectionManager.getPostMethod(url);
        String prepay_id = "";
        try
        {
            httpost.setEntity(new StringEntity(xmlParam, "UTF-8"));
            HttpResponse response = httpclient.execute(httpost);
            String jsonStr = EntityUtils.toString(response.getEntity(), "UTF-8");
            Map<String, Object> dataMap = new HashMap<String, Object>();
            // System.out.println(jsonStr);
            
            if (jsonStr.indexOf("FAIL") != -1)
            {
                return prepay_id;
            }
            Map map = doXMLParse(jsonStr);
            String return_code = (String)map.get("return_code");
            prepay_id = (String)map.get("prepay_id");
        }
        catch (Exception e)
        {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        
        return prepay_id;
    }
    
    /**
     * 解析xml,返回第一级元素键值对。如果第一级元素有子节点，则此节点的值是子节点的xml数据。
     * 
     * @param strxml
     * @return
     * @throws JDOMException
     * @throws IOException
     */
    public static Map<String, Object> doXMLParse(String strxml)
    {
        if (null == strxml || "".equals(strxml))
        {
            return null;
        }
        
        InputStream in = null;
        Map<String, Object> m = null;
        try
        {
            m = new HashMap<String, Object>();
            in = String2Inputstream(strxml);
            SAXBuilder builder = new SAXBuilder();
            Document doc = builder.build(in);
            Element root = doc.getRootElement();
            List list = root.getChildren();
            Iterator it = list.iterator();
            while (it.hasNext())
            {
                Element e = (Element)it.next();
                String k = e.getName();
                String v = "";
                List children = e.getChildren();
                if (children.isEmpty())
                {
                    v = e.getTextNormalize();
                }
                else
                {
                    v = getChildrenText(children);
                }
                
                m.put(k, v);
            }
        }
        catch (Exception e)
        {
            logger.error("doXMLParse--error--is:", e);
        }
        finally
        {
            // 关闭流
            try
            {
                in.close();
            }
            catch (IOException e)
            {
                logger.error("doXMLParse---ioclose--error--is:", e);
            }
        }
        
        return m;
    }
    
    /**
     * 获取子结点的xml
     * 
     * @param children
     * @return String
     */
    public static String getChildrenText(List children)
    {
        StringBuffer sb = new StringBuffer();
        if (!children.isEmpty())
        {
            Iterator it = children.iterator();
            while (it.hasNext())
            {
                Element e = (Element)it.next();
                String name = e.getName();
                String value = e.getTextNormalize();
                List list = e.getChildren();
                sb.append("<" + name + ">");
                if (!list.isEmpty())
                {
                    sb.append(getChildrenText(list));
                }
                sb.append(value);
                sb.append("</" + name + ">");
            }
        }
        
        return sb.toString();
    }
    
    public static InputStream String2Inputstream(String str)
    {
        return new ByteArrayInputStream(str.getBytes());
    }
    
}